| 摘要 |
PROBLEM TO BE SOLVED: To obtain a prepreg having a low permittivity and also a low dielectric loss tangent when used as a laminate, and forming small roughness of a hole wall when being drilled by employing liquid crystalline polyarylate fibers for a fibrous substrate material and employing a specific cyanate resin composition for a matrix. SOLUTION: This prepreg is constituted by employing (A) fibers made of a liquid crystalline polyarylate having e.g. a structure of the formula [wherein (m) is preferably 35-45 and; (n) is preferably 55-65] for a fibrous substrate material for a nonwoven fabric or the like and employing (B) a cyanate resin composition, for a matrix, comprising (i) a cyanate resin, (ii) a monovalent phenolic compound and (iii) polyphenylene ether resin as essential ingredients. A binder such as an epoxy resin preferably is made to adhere to the fibrous substrate material. The ingredient B is obtained by reacting 2,2-bis(4-cyanatophenyl) propane and p-(cv-cumyl)phenol with poly (2,6-dimethyl-1,4-phenylene) ether in a solvent. |
